The image shows various marine animals that lived during the Cambrian period. These animals include trilobites, brachiopods, and echinoderms. Trilobites were the dominant marine animals during this time and are characterized by their three-lobed body. Brachiopods are a type of marine invertebrate that have a two-part shell. Echinoderms are a type of marine invertebrate that have a spiny skin.